From: Jiasheng Jiang <jiashengjiangcool@gmail.com>
To: ffmpeg-devel@ffmpeg.org
Cc: Jiasheng Jiang <jiashengjiangcool@gmail.com>
Subject: [FFmpeg-devel] [PATCH] libavfilter/af_channelmap: Add check for av_calloc() to avoid potential NULL pointer dereference
Date: Wed, 6 Aug 2025 00:28:46 +0000
Message-ID: <20250806002846.23288-1-jiashengjiangcool@gmail.com> (raw)
Add check for the return value of av_calloc() to avoid potential NULL pointer dereference.
Fixes: 7dc81d33c2 ("lavfi/af_channelmap: remove an arbitrary limit on channel count")
Signed-off-by: Jiasheng Jiang <jiashengjiangcool@gmail.com>
---
libavfilter/af_channelmap.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/libavfilter/af_channelmap.c b/libavfilter/af_channelmap.c
index b864317312..9466a8e22e 100644
--- a/libavfilter/af_channelmap.c
+++ b/libavfilter/af_channelmap.c
@@ -315,6 +315,9 @@ static av_cold int channelmap_init(AVFilterContext *ctx)
}
presence_map = av_calloc(s->nch, sizeof(*presence_map));
+ if (!presence_map)
+ return AVERROR(ENOMEM);
+
for (i = 0; i < s->nch; i++) {
const int out_idx = s->map[i].out_channel_idx;
ret = check_idx_and_id(ctx, out_idx, s->map[i].out_channel, &s->output_layout, "out");
--
2.25.1
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